ZDDP is a metal. It's sacrificial in your engine. It sounds wrong but it lubricates your bearings and gets destroyed instead of your bearings being destroyed. I use Rotella T 15W-40 with 2 ozs. of Redline booster. That's the proper ratio.

Any less and you're not really helping anything.

Any more and the zinc will actually erode the bearing surfaces.

justin_o_guy2 wrote on 09/28/15 at 18:48:26:

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so rotella t triple 15w40 without the extra zddp???

DR, my opinion is just an opinion. The 100,000 mile club have experience. I got 20,000 miles on mine, and the first five weren't too crazy, after I did tires, and all the mods, I rode the snot outta that thing. Oil use remained predictable, New oil, low use, as miles added up, oil use increased, change oil, use slows back down,
I couldn't see any sign of wear, the rockers and cam looked fine,
I would run it. Have fun, pay attention to the oil, check it, it can sneak up on ya. Gotta suck to check oil and see it low.

It's popular with big rig drivers. If it's good enough to keep those vicious, brutal engines alive, gotta be good.

I run it neat except for the beast which has a new cam in it...
need to boost it for a couple of changes.

Don't run extended mileage and the zddp that comes in rotella is just fine.

What is this sites recommended ceiling for zddp ppm moving forward?  Thanks.

Best regards,

The Rotella T has 1250 ppm of ZDDP in it when poured right from the bottle.

Dave hands out, for free, information about the oil. That stuff just isn't in the oils used in vehicles with cataclysmic perverters, and, that's the most common thing. And diesels use compression to ignite the fuel,, think about the loads on the bearings. And this oil is very popular with diesel mechanics and owners. When I hired a guy to come help me out on the backhoe, he asked about the oil, I said Rotella, his face said more than his mouth. He really didn't expect something old man out in the woods to be on to the best oil out there.
I recently went looking for information about a four wheeler, Kawasaki Bayou,250, and the old guys are running Rotella,,

Can the zddp be boosted? Yes,,
Does it need it?  Depends, define need.. be real, just how many miles do you want to ride it? How many years will the bike last? So, the engine Wil run for twenty five years, will you? Are you willing to keep the rest of it Up, serviceable, for that long, or use it, enjoy it, sell it?


I'm wishing the 100,000 mile guys would chip in. How many years did that take, maintenance required (not battery, brakes, lamps,oil changes  ), additives,

I Saw a beat down, rusty, ugly, ugly Savage, probably fifteen years ago with real close to 100,000 on it. Looking at it, I can't believe it received ANY TLC, oil changes,maybe, oil additives,  Ohhh, I can't imagine it..

Ok, I just reread the booster table thread. Seems I was targeting a higher number than I thought. I was thinking I was using 1200 ppm. I was really using ~1500 ppm. I was also (at time of last oil change) breaking in a new engine. It's about time for another oil change now. I'll recant my last statement and say now that I'll be running Rotella T straight. Well, maybe not exactly straight. I'll dilute the remaining 1/2 gallon or so of boosted Rotella with straight Rotella until I use it up.

At 16,000, it's time to check the cam chain.